No. While blood pressure is one of the physiological reactions measured, it does not affect the accuracy of the test. However, prior to examination, it is necessary to ensure medical fitness of the subject.

No, Polygraph test is a physiological test of psychological conditions of the person which are measured through a) blood pressure b) breath/respiration rate c) skin conductivity by attaching rubber/plastic cuffs to the forearm, chest and fingers just as in case of blood pressure test or ECG test

A Polygraph (popularly referred to as a Lie-Detector) is an instrument that measures and records physiological changes caused by the sympathetic nervous system, while the subject is asked a series of questions for which he has to answer “yes” or “no”, wherein deliberate lying produces bodily reactions reflected in blood pressure, respiration (breath rate), skin sensitivity etc. measured through the couplings made to the body of the person.